The thing is you still are doing that. Removing the character means you've removed everything he's built up. You've also rushed into a production with a cast grieving and a reworked script just a few months after his death. It took Ryan Coogler 2 years to write the sequel script and then he had to work on another while location scouting, pre-production, etc. These rumors seem to be getting out for a reason.
Marvel never has negative stuff openly leak out or has negative rumors swirling around their films
Whether true or not the Wright stuff is shyt she's forced to deal with and in position she never expected. Im not sure Boseman would have wanted his cast and crew stressed out, multiple rewrites and potentially making a "meh" movie to "honor" him.
Now Coogler is talented enough to still make a good film, but damn if this isnt the toughest job someone has had.